Hi, On 2017년 11월 12일 17:27, Gustavo A. R. Silva wrote: > NULL check before freeing functions like kfree is not needed. > > This issue was detected with the help of Coccinelle. > > Signed-off-by: Gustavo A. R. Silva <[email protected]> > --- > drivers/devfreq/devfreq.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c > index 78fb496..21164a9 100644 > --- a/drivers/devfreq/devfreq.c > +++ b/drivers/devfreq/devfreq.c > @@ -672,8 +672,7 @@ struct devfreq *devfreq_add_device(struct device *dev, > > device_unregister(&devfreq->dev); > err_dev: > - if (devfreq) > - kfree(devfreq); > + kfree(devfreq); > err_out: > return ERR_PTR(err); > } >
It prevents the memory leak when the registration of devfreq device is failed. You can check the detailed reason on patch1[1]. [1] PM / devfreq: Fix memory leak when fail to register device - https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9e14de1077e9c34f141cf98bdba60cdd5193d962 -- Best Regards, Chanwoo Choi Samsung Electronics
